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FOC | Family List | FOC Vol. 2-3 | Dryopteridaceae | Polystichum

23. Polystichum rigens Tagawa, Acta Phytotax. Geobot. 6(2): 91. 1937.

阔鳞耳蕨 kuo lin er jue

Polystichum platychlamys Ching.

Plants evergreen. Rhizome erect, stout, densely scaly; scales brown or dark brown, lanceolate. Fronds 40-60 cm; stipe stramineous, 14-30 cm, 3-5 mm in diam. at base, densely scaly; scales brown to dark brown, ovate and lanceolate. Lamina bipinnatipartite, ovate to narrowly oblong, 26-50 × 11-16 cm, rounded-cuneate or nearly truncate, acuminate; rachis without proliferous bulbils, abaxially densely scaly; scales light brown or brown, ovate and lanceolate, margins ciliate, not twisted. Pinnae 14-23 pairs, alternate, slightly ascendant or attached at right angles to rachis, linear-lanceolate, sometimes falcate, middle pairs 6-11 × 1.5-2.5 cm, obliquely cordate or rounded-cuneate, shortly stalked, pinnatipartite with 1 or 2 pairs of basal free pinnules, acuminate. Pinnules and lobes 10-15 pairs, alternate, ascendant, narrowly ovate or deltoid-ovate, basal acroscopic lobes largest, 1-2 cm × 5-6 mm, bases rounded, margins with spinulose forward-pointing teeth, apices acuminate and spinulose; abaxially scaly; microscales filiform, strongly ciliate at base; frond texture leathery; venation pinnate on pinnules and lobes, slightly concave abaxially, flat or slightly concave adaxially. Sori in 1 row on each side of midrib; indusia present, subentire.

Forests; ca. 1200 m. Chongqing (Chengkou, Wushan), Gansu (Kangxian, Tianshui), Hubei (Shennongjia, Zhuxi), Shaanxi (Baoji, S Wutai Shan) [Japan].


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